<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <input type="text" id="i1" placeholder="姓名">
    <input type="text" id="i2" placeholder="工资">
    <input type="text" id="i3" placeholder="工作">
    <input type="button" value="添加" onclick="f()">
    <table border="1">
        <tr>
            <th>姓名</th>
            <th>工资</th>
            <th>工作</th>
        </tr>
    </table>
    <script>
        //获取三个输入框
        let i1 = document.querySelector("#i1");
        let i2 = document.querySelector("#i2");
        let i3 = document.querySelector("#i3");
        //通过标签名获取table
        let table = document.querySelector("table");
        function f() {
            //创建tr和td
            let tr = document.createElement("tr");
            let nameTd = document.createElement("td");
            let salaryTd = document.createElement("td");
            let jobTd = document.createElement("td");
            //将用户输入的内容添加到td中
            nameTd.innerText = i1.value;
            salaryTd.innerText = i2.value;
            jobTd.innerText = i3.value;
            //把td装进(追加到)tr
            tr.append(nameTd,salaryTd,jobTd);
            //把tr追加到table
            table.append(tr);
        }
    </script>
</body>
</html>